Swivel mount for striking bags



June 15, 1943. A WRI HT 2,322,081

SWIVEL MOUNT FOR STRIKING BAGS Filed March 16, 1942 Patented June 15,1943 UNITED srres PATENT OFFICE SWIVEL MOUNT FOR STRIKING BAGS Alvin C.Wright, Grand Rapids, Mich.

Application March 16, 1942, Serial No. 434,816

3 Claims.

The present invention relates to swivel mounts for striking bags.

The primary objects of the invention are to provide a swivel mount forstriking bags which is so designed that it greatly prolongs the life ofthe rope by means of which the striking bag is suspended, thuseliminating the necessity of frequent demounting of the bag andreplacement of the rope; to provide such a swivel mount for strikingbags which is smooth and quiet in action; to provide such a swivel mountcomprising a ball and socket joint, and means in the ball whereby thestriking bag rope is securely gripped but may readily be removed and anew rope quickly substituted when replacement becomes necessary; toprovide such a ball and socket swivel mount in which adjustment may bemade of the frictional engagement between the ball and socket to thusadjust as desired the freedom of movement of the striking bag, saidadjusting means serving further to compensate for wear between the balland the socket, and insuring a snug fit between the ball and the socketso as to eliminate jumping of the bag and consequent interference withthe rhythm of the bags swing; and to provide such a swivel mount whichis emcient in use, economical in manufacture, and attractive inappearance.

An illustrative embodiment of the invention is shown in the accompanyingdrawing, wherein:

Figure 1 is a front elevational view of a striking bag secured by meansof the swivel mount of the present invention to a rebound board affixedto a ceiling, the bag being shown in its uppermost swung position indotted lines;

Figure 2 is an enlarged sectional view thereof taken on line 2-2 ofFigure 1 and showing the swivel mount in bottom plan view;

Figure 3 is a sectional view of the swivel mount taken on line 33 ofFigure 2;

Figure 4 is a sectional view of the same taken on line 4-4 of Figure 3;

Figure 5 is a perspective view of certain parts of the swivel mountprior to their assembly; and

Figure 6 is an enlarged fragmentary sectional view taken on line 6-6 ofFigure 3.

Referring now in detail to this drawing wherein like parts aredesignated by the same numerals in the several views, a conventionalstriking bag I having a rope 2 attached thereto is swingably suspendedfrom the usual rebound board 3 attached by any suitable means to ahorizontal surface or ceiling 4, by means of the swivel mount of thepresent invention which comprises an annular metal base 5 having aflange 6 secured to the rebound board 3 as by means of wood screws 1passing through apertures 8 in said flange and into the rebound board.The base 5 has a downwardly extending externally threaded shank 9 whosebottom surface If] is downwardly divergent. The base 5 may have a hollowcenter II as shown, thus conserving metal.

An internally threaded collar I2 is detachably mounted on the lower endof the shank 9, said collar [2 having a downwardly convergentspherically formed bearing surface l3 in its lower end which forms withthe downwardly divergent bottom surface I0 of the shank 9 a socketgenerally designated I4. The bottom surface l5 of the collar I2 isdownwardly divergent for a purpose hereinafter described. A lock nut I6is threaded on the shank 9 above the collar 12 for locking the collar l2in adjusted position on the shank 9, and the collar I2 and lock nut iiiare provided with external radial bores ll, I8 respectively into whichmay be inserted a suitable tool for tightening these parts. 5

p A ball I9 is disposed in the socket i l and is provided with anupwardly extending annular cavity 20 therein adapted to receive theupper end of the rope 2 on the striking bag 1. Means are provided forfirmly but detachably securing the rope 2 in the cavity 20 of the balll9, which means comprise a pair of semi-cylindrical complementaryinternally threaded clamping members 2|, 22 adapted to grip the rope 2therebetween and to snugly fit within the annular cavity 20 in the ball19.

A pair of set screws 23, 24 are diametrically oppositely threaded in theball I9, and these screws have hexagonal openings 25, 26 respectively intheir outer ends for the reception of a suitable wrench by means ofwhich the screws may be tightened into engagement with the complementaryclamping members 2!, 22, and the clamping members are thus firmly butdetachably secured within the cavity 20 with the rope 2 securely grippedtherebetween. The outer end surfaces of the set screws 23, 24 arespherically formed to conform to the spherical contour of the ball l9when these parts are assembled.

In assembling the swivel mount, the rope 2 attached to the striking bagI is first passed through the collar [2 which at this phase is demountedfrom the shank 9 of the base 5. The rope 2 is then manually pressedbetween the clamping members 2!, 22 which are next inserted into thecavity 20 in the ball I9, whereupon the set screws 23, 24 are tighteneddown, all as suggested in Figure 5. The collar I2 is then turned ontothe shank 9'of the base 5 until the desired freedom of movement of theball [9 within the socket I4 is attained, and the lock nut I6 is thenturned down against the collar 12 to lock these parts in assembly.

It will readily be seen that as wear occurs between the ball and thesocket, the collar I2 may be turned slightly farther onto the shank 9when assembling the mount, thus compensating for the wear, and that anydesired degree of freedom of movement between the ball and the socketmay be attained. Preferably the parts are so-adjusted in position thatthe ball has a maximum of freedom of movement but there is no play ofthe ball within the socket, thus eliminating jumping of the striking bagand consequent interference with the bags rhythm and with the timing ofthe striker.

The downwardly divergent bottom surface [5 of the collar I2- ispreferably approximately '75 degrees from the perpendicular and theouter and inner edges of this surface are preferably slightly rounded asindicated at 21, 28 respectively in Figure 6. This formation provides asmooth surface for the rope 2 to butt against when the bag reaches theuppermost phase of its swing, and the surface is substantially in linewith the rope during this phase. Thus very little wear is inflicted onthe rope, and the frequent replacement of the rope which was foundnecessary in th use of former types of swivel mounts which virtuallycut" the rope, has been elimi nated.

While but. one speicific embodiment of the invention has been hereinshown and described, it will be understood that numerous details ofconstruction of that particular embodiment of the invention may bealtered or omitted without departing from the spirit of the invention asthe same is defined by the following claims.

I claim:

1. In a device of the class described, a base adapted for attachment toa horizontal surface and having a downwardly extending shank, a collardetachably mounted on the lower end of said shank and having a bearingsurface in its lower end forming with the lower end of the shank asocket, a ball disposed in the socket and provided with an upwardlyextending cavity therein adapted to receive the end of a rope, and meansfor detachably securing said rope within said cavity comprisingcomplementary internally threaded clamping members adapted to grip saidrope therebetween and to snugly fit within said cavity.

2. In a device of the class described, a base adapted for attachment toa horizontal surface and having a downwardly extending shank, a collardetachably mounted on the lower end of said shank and having a bearingsurface on its lower end forming with the lower end of the shank asocket, a ball disposed in the socket and provided with an upwardlyextending cavity therein adapted to receive the end of a rope, and meansfor detachably securing said rope within said cavity comprisingcomplementary internally threadedclamping members adapted to grip saidrope therebetween and to snugly fit within said cavity and a pair of setscrews diametrically oppositely threaded in the ball and adapted to gripsaid clamping members therebetween.

3. In a device of the class described, a base adapted for attachment toa horizontal surface and having a downwardly extending externallythreaded shank with a downwardly divergent bottom surface, an internallythreaded collar detachably mounted on the lower end of said shank andhaving a downwardly convergent bearing surface in its lower end formingwith the downwardly divergent bottom surface of the shank a socket andthe bottom surface of the collar being downwardly divergent, a lock nutthreaded on said shank above the collar, a ball disposed in the socketand provided with an upwardly extending cavity therein adapted toreceive the end of a rope, and means for detachably securing said ropewithin said cavity comprising complementary internally threaded clampingmembers adapted to grip said rope therebetween and to snugly fit withinsaid cavity-and a pair of set screws diametrically oppositely threadedin the ball andadapted to grip said clamping members therebetween.

ALVIN C. WRIGHT.

